CN116852881A - Ribbon tension stability control system and method for thermal transfer printer - Google Patents

Ribbon tension stability control system and method for thermal transfer printer Download PDF

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Publication number
CN116852881A
CN116852881A CN202310960500.9A CN202310960500A CN116852881A CN 116852881 A CN116852881 A CN 116852881A CN 202310960500 A CN202310960500 A CN 202310960500A CN 116852881 A CN116852881 A CN 116852881A
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CN
China
Prior art keywords
driving assembly
ribbon
controlling
power generation
mode
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CN202310960500.9A
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Chinese (zh)
Inventor
邱继涛
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Shanghai Dikai Coding Industry Co ltd
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Shanghai Dikai Coding Industry Co ltd
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Application filed by Shanghai Dikai Coding Industry Co ltd filed Critical Shanghai Dikai Coding Industry Co ltd
Priority to CN202310960500.9A priority Critical patent/CN116852881A/en
Publication of CN116852881A publication Critical patent/CN116852881A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/08—Ink-ribbon guides with tensioning arrangements

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  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

The invention discloses a system and a method for controlling tension stability of a ribbon of a thermal transfer printer. The system comprises a first driving component, a second driving component and a control module; the first driving component is connected with the second driving component through the color ribbon; the control module is electrically connected with the first driving component and the second driving component; the control module is used for controlling the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the ribbon to travel forward for a preset distance in an initialization stage, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor module so as to enable the ribbon to travel backward for the preset distance; and in the thermal printing stage, the first driving assembly is controlled to be switched into a motor mode and the second driving assembly is controlled to be switched into the power generation braking module so as to enable the ribbon to advance forward for the thermal printing distance, and the first driving assembly is controlled to be switched into the power generation braking mode and the second driving assembly is controlled to be switched into the motor module so as to enable the ribbon to advance backward for the thermal printing distance. The scheme realizes the stable control of the tension of the ribbon.

Description

Ribbon tension stability control system and method for thermal transfer printer
Technical Field
The embodiment of the invention relates to the technical field of thermal transfer printing, in particular to a system and a method for controlling the tension stability of a ribbon of a thermal transfer printer.
Background
In a thermal transfer printer of the series, in order to transfer the thermal transfer material on the ribbon to the packaging film, the tension of the ribbon needs to be kept within a certain range, after a pattern is transferred, the ribbon needs to be fed, the next transfer operation is repeated, for continuous thermal transfer, the ribbon is not only moved forward, but also reversely stretched to a certain position to ensure continuous transfer of the ribbon, and the ribbon needs to be kept at a certain tension in the process.
For conventional thermal transfer printers, the winding and unwinding stepping motors are included, and when the ribbon walks, the winding motor and the unwinding motor keep synchronous motion, and tension control is performed in a mechanical and pressure mode in the motion process, so that tension stability is ensured. However, the mechanical structure and control of the methods are relatively complex, and tension detection lags, so that the tension is unstable; in the printing process, printing is unclear, quality is inconsistent, tape breakage is easy or printing speed is limited, and meanwhile, cost is relatively high.
Disclosure of Invention
The invention provides a system and a method for stably controlling the tension of a ribbon of a thermal transfer printer, which realize the stable control of the tension of the ribbon in the thermal printing process.
To achieve the above object, in a first aspect, an embodiment of the present invention provides a thermal printer ribbon tension stability control system, including: the device comprises a first driving assembly, a second driving assembly and a control module; the first driving component is connected with the second driving component through a color ribbon;
the control module is electrically connected with the first driving assembly and the second driving assembly; the control module is used for controlling the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the color ribbon to forward travel a preset distance in an initialization stage, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor mode so as to enable the color ribbon to reversely travel the preset distance;
and the first driving component is further controlled to be switched into the power generation braking mode and the second driving component is further controlled to be switched into the motor mode so as to enable the ribbon to travel forward for the thermal printing distance, and the first driving component is further controlled to be switched into the power generation braking mode and the second driving component is further controlled to be switched into the motor mode so as to enable the ribbon to travel backward for the thermal printing distance.
Optionally, the first driving component includes at least two phases of first stator coils, a first rotor, at least one first damping resistor, and at least one first control switch; the maximum number of the first damping resistors is the same as the number of the first stator coils; the first damping resistor and the first control switch are connected in series; the first stator coil is connected with the first damping resistor and the first control switch in parallel;
controlling the first drive assembly in a motor mode, comprising:
the control module outputs pulse current to each first stator coil in the first driving assembly according to a first rotating instruction, and controls each first control switch to be disconnected so as to enable the first driving assembly to be in the motor mode;
controlling the first drive assembly in a power generation braking mode, comprising:
the control module controls not to output pulse current to each first stator coil in the first driving assembly according to a first braking instruction, and controls at least one first control switch to be opened at a first variable switching frequency so that the first driving assembly is in the power generation braking mode.
Optionally, the second driving component includes at least two phases of a second stator coil, a second rotor, at least one second damping resistor and at least one second control switch; the maximum number of the second damping resistors is the same as the number of the second stator coils;
the second damping resistor and the second control switch are connected in series; the second stator coil is connected with the second damping resistor and the second control switch in parallel;
controlling the second drive assembly in a motor mode, comprising:
the control module outputs pulse current to each second stator coil in the second driving assembly according to a second rotation instruction, and controls the second control switch to be disconnected so as to enable the second driving assembly to be in the motor mode;
controlling the second drive assembly in a power generation braking mode, comprising:
the control module controls not to output pulse current to each second stator coil in the second driving assembly according to a second braking instruction, and controls at least one second control switch to be opened at a second variable switching frequency so as to enable the second motor assembly to be in the power generation braking mode.
Optionally, the control module includes a first controller and a second controller;
the first controller is used for controlling the first driving assembly or the second driving assembly to be in the motor mode;
the second controller is used for controlling the first driving assembly or the second driving assembly to be in the power generation braking mode.
Optionally, the control module further comprises a tension determining unit;
the tension determining unit is used for detecting the tension of the ribbon on the ribbon according to the current on the first damping resistor or the second damping resistor.
In a second aspect, an embodiment of the present invention further provides a thermal print ribbon tension stability control method, where the method is applied to the thermal print ribbon tension stability control system described in the first aspect, and the thermal print ribbon tension stability control method includes:
in an initialization stage, controlling the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the ribbon to travel forward for a preset distance, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor mode so as to enable the ribbon to travel backward for the preset distance;
judging whether the preset distance is larger than an initialization distance or not;
if yes, entering a thermal printing stage, controlling the first driving assembly to be switched into the motor mode and controlling the second driving assembly to be switched into the power generation braking mode so as to enable the ribbon to forward travel a thermal printing distance, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor mode so as to enable the ribbon to reversely travel the thermal printing distance.
Optionally, the first driving assembly is controlled to be in a motor mode, specifically:
outputting pulse current to each first stator coil in the first driving assembly according to a first rotating instruction, and controlling each first control switch to be disconnected so as to enable the first driving assembly to be in a motor mode;
the first driving assembly is controlled to be in a power generation braking mode, specifically:
and controlling not to output pulse current to each first stator coil in the first motor according to a first braking instruction, and controlling at least one first control switch to be opened at a first variable switching frequency so as to enable the first motor assembly to be in a power generation braking mode.
Optionally, the second driving assembly is controlled to be in a motor mode, specifically:
outputting pulse current to each second stator coil in the second driving assembly according to a second rotation instruction, and controlling the second control switch to be switched off so as to enable the second driving assembly to be in a motor mode;
the second driving assembly is controlled to be in a power generation braking mode, specifically:
and controlling not to output pulse current to each second stator coil in the second motor according to a second braking command, and controlling at least one second control switch to be opened at a second variable switching frequency so as to enable the second motor assembly to be in a power generation braking mode.
Optionally, the method further comprises:
receiving a current on the first damping resistor or the second damping resistor;
and detecting the tension of the ribbon on the ribbon according to the current on the first damping resistor or the second damping resistor.
According to the embodiment of the invention, the first driving component is connected with the second driving component through the color ribbon; the control module is electrically connected with the first driving assembly and the second driving assembly; in this way, in the initialization stage, the control module controls the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the color ribbon to forward travel a preset distance, and controls the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor module so as to enable the color ribbon to reversely travel the preset distance; thus, stable control of the tension of the ribbon in the initial stage of thermal printing is ensured, and the problem that the tension of the ribbon is unstable due to synchronous running of the driving assembly is avoided; meanwhile, in the thermal printing stage, the control module controls the first driving assembly to be switched into a motor mode and the second driving assembly to be switched into a power generation braking module so as to enable the ribbon to forward travel a thermal printing distance, and controls the first driving assembly to be switched into a power generation braking mode and the second driving assembly to be switched into a motor module so as to enable the ribbon to reversely travel the thermal printing distance, so that stable control of ribbon tension in the thermal printing process is realized.
Drawings
FIG. 1 is a schematic diagram of a ribbon tension stabilizing control system for a thermal transfer printer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a specific structure of a ribbon tension stabilizing control system for a thermal transfer printer according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for controlling ribbon tension stability in a thermal transfer printer according to an embodiment of the present invention;
fig. 4 is a flowchart of another method for controlling ribbon tension stability in a thermal transfer printer according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a ribbon tension stabilizing control system of a thermal transfer printer according to an embodiment of the present invention, as shown in fig. 1, the system includes a first driving assembly 10, a second driving assembly 20, and a control module 30; the first driving assembly 10 is connected with the second driving assembly 20 through the color ribbon 40; the control module 30 is connected with the first driving assembly 10 and the second driving assembly 20 through electric signals; the control module 30 is configured to control the first driving assembly 10 to be in a motor mode and the second driving assembly 20 to be in a power generation braking mode to enable the ribbon 40 to travel a preset distance in a forward direction, and control the first driving assembly 10 to be switched to the power generation braking mode and the second driving assembly 20 to be switched to be a motor module to enable the ribbon 40 to travel a preset distance in a reverse direction during an initialization stage;
the device is further used for controlling the first driving assembly 10 to be switched to the motor mode and the second driving assembly 20 to be switched to the power generation braking mode again so as to enable the ribbon to travel the thermal printing distance in the forward direction during the thermal printing stage, and controlling the first driving assembly 10 to be switched to the power generation braking mode and the second driving assembly 20 to be switched to the motor module so as to enable the ribbon to travel the thermal printing distance in the reverse direction.
Wherein the first driving assembly 10 and the second driving assembly 20 each comprise two modes of operation; one is a motor mode and the other is a power generation braking mode; each driving component generates traction force under the motor mode to drive the driving component to move forwards; each driving assembly generates braking force to prevent the driving assembly from moving forwards and backwards in a power generation braking mode;
the actual thermal printing process is divided into an initialization stage and a thermal printing stage, during the initialization stage, the control module 30 controls the first driving component 10 to be in a motor mode and the second driving component 20 to be in a power generation braking mode, if the traction force generated by the first driving component 10 in the motor mode is greater than the braking force generated by the second driving component 20 in the power generation braking mode, the ribbon 40 forwards advances, when the ribbon 40 forwards advances for a preset distance, the first driving component 10 is controlled to be switched to the power generation braking mode and the second driving component 20 is controlled to be switched to be in the motor mode, and if the braking force of the first driving component 10 in the power generation braking mode is less than the traction force generated by the second driving component 20 switched to be in the motor mode, the ribbon 40 reversely advances for a preset distance; thus, in the initialization stage, the two driving components move in opposite directions and not in synchronous directions, so that the color ribbon is kept stable constantly.
Meanwhile, in the thermal printing stage, the first driving assembly 10 is controlled to be switched to a motor mode and the second driving assembly 20 is controlled to be switched to a power generation braking mode, and if the traction force generated by the first driving assembly 10 in the motor mode is larger than the braking force generated by the second driving assembly 20 in the power generation braking mode, the color ribbon forwards moves; to save the ribbon and ensure continuous transfer of the ribbon, when the ribbon travels forward for a thermal printing distance, the first driving assembly 10 is controlled to be switched to a power generation braking mode and the second driving assembly 20 is controlled to be switched to a motor mode, if the braking force generated by the first driving assembly 10 in the power generation braking mode is smaller than the traction force generated by the second driving assembly 20 in the motor mode, the ribbon travels backward for the thermal printing distance; thus, in the thermal printing stage, the color ribbon is kept stable constantly due to the fact that the two driving components move in opposite directions and not move in synchronous directions.
Optionally, further details are provided on the basis of the foregoing embodiment, fig. 2 is a schematic structural diagram of a ribbon tension stabilizing control system of a thermal transfer printer according to an embodiment of the present invention, as shown in fig. 2, where, the first driving assembly 10 includes at least two phase first stator coils 11 (including three phase first stator coils are schematically shown in fig. 2), a first rotor 12, at least one first damping resistor 13, and at least one first control switch 14; the maximum number of the first damping resistors is the same as the number of the first stator coils; the first damping resistor 13 and the first control switch 14 are connected in series; the first stator coil 11 is connected in parallel with the first damping resistor 13 and the first control switch 14;
the second driving assembly 20 comprises at least two phases of a second stator coil 21, a second rotor 22, at least one second damping resistor 23 and at least one second control switch 24; the maximum number of the second damping resistors is the same as the number of the second stator coils 21; the second damping resistor 23 and the second control switch 24 are connected in series; the second stator coil 21 is connected in parallel with a second damping resistor 23 and a second control switch 24;
when the first driving assembly 10 and the second driving assembly 20 are in the motor mode, the working principle is the same as that of the two-phase motor or the three-phase motor, namely, the control module 30 outputs pulse current to each phase of stator coil, magnetic fields are generated in each phase of stator coil, and the magnetic fields interact with the magnetic fields generated by the rotor so as to drive the rotor to rotate, so that the two-phase motor or the three-phase motor rotates;
the working principle of any one of the first driving assembly 10 and the second driving assembly 20 in the power generation braking mode is as follows: by utilizing the electromagnetic induction principle, the control module 30 does not output pulse current to each phase of stator coils, and at the moment, because the other driving assembly is in a motor mode, the rotor in the driving assembly is driven to rotate, so that a changed magnetic field is generated, and induced electromotive force is generated on each phase of stator coils by the changed magnetic field; thus, each closed loop formed by each phase of stator coil, damping resistor and control switch generates damping current, and the damping current generates braking force for preventing the rotor from moving; wherein, the magnitude of the damping current is directly proportional to the braking force and the tension of the same color belt; in the embodiment, the magnitude of the damping current can be adjusted by adjusting the frequency of the control switch, so that the magnitude of the braking force is adjusted, and the magnitude of the tension of the ribbon is adjusted; or the magnitude of the damping current can be adjusted by adjusting the magnitude of the damping resistor.
Specifically, the first driving assembly 10 is controlled to be in the motor mode, that is, the control module 30 outputs a pulse current to each first stator coil 11 in the first driving assembly 10 according to the first rotation command, and controls each first control switch 13 to be turned off so as to make the first driving assembly 10 be in the motor mode; the first driving assembly 10 is controlled to be in the power generation braking mode, that is, the control module 30 controls not to output pulse current to each first stator coil 11 in the first motor according to the first braking command, and controls at least one first control switch 14 to be opened at a preset first variable switching frequency so that the first motor assembly 10 is in the power generation braking mode. Likewise, the second driving assembly 20 is controlled to be in the motor mode, that is, the control module 30 outputs a pulse current to each second stator coil 21 in the second driving assembly 20 according to the second rotation command, and controls the second control switch 23 to be turned off so as to make the second driving assembly 20 be in the motor mode; the second driving assembly 20 is controlled to be in the power generation braking mode, that is, the control module 30 controls not to output pulse current to each second stator coil 21 in the second motor according to the second braking command, and controls at least one second control switch 23 to be opened at the second variable switching frequency so as to place the second motor assembly 20 in the power generation braking mode.
It can be understood that the number of the stator coils of each driving assembly in this embodiment may be two or three; the number of stator coils in the drive assembly is not particularly limited; in addition, the number of the damping resistors and the control switches of each driving assembly can also be determined according to the actual requirement of the driving assembly on the magnitude of the braking force generated in the power generation braking mode, and if the braking force generated by the requirement is larger, the number of the damping resistors and the control switches can be the same as the number of the stator coils; if the braking force generated by the requirement is smaller, the number of the damping resistors and the control switches can be smaller than the number of the stator coils; for example, if the first stator coil of the first driving assembly is two phases, the number of the first damping resistors and the number of the first control switches may be 1 or 2; if the first stator coil of the first driving assembly is three-phase, the number of the first damping resistors and the number of the first control switches may be one, two, or three, and the number of the damping resistors and the number of the control switches in the driving assembly are not particularly limited.
Optionally, with continued reference to fig. 2, the control module 30 includes a first controller 31 and a second controller 32; a first controller 31 for controlling the first driving assembly 10 or the second driving assembly 20 to be in a motor mode; a second controller 32 for controlling the first drive assembly 10 or the second drive assembly 20 to be in a power generation braking mode. Wherein, the first controller 31 and the second controller 32 are separately arranged and respectively used for controlling the motor mode and the power generation braking mode, thereby realizing redundancy control.
Optionally, with continued reference to fig. 2, the control module 30 further includes a tension determination unit 33; the tension determining unit 33 is configured to detect the tension of the ribbon on the ribbon according to the current on the first damping resistor or the second damping resistor. Wherein, the magnitude of the damping current is directly proportional to the braking force and the tension of the same color belt; in this embodiment, the tension determining unit 33 may detect the ribbon tension on the ribbon in real time according to the current on the first damping resistor or the second damping resistor, so that the detection precision and accuracy are higher, and the problem of complex overall system structure and lower precision caused by the detection of the pressure detection sensor in the prior art is avoided.
Based on the same inventive concept, the embodiment of the invention also provides a method for controlling the tension stability of the ribbon of the thermal transfer printer, the method is applied to the ribbon tension stability control system of the thermal transfer printer described in the above embodiment, and fig. 3 is a flowchart of the ribbon tension stability control method of the thermal transfer printer provided by the embodiment of the invention; as shown in fig. 3, the method comprises the steps of:
s110, in an initialization stage, controlling the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the ribbon to travel forward for a preset distance, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor module so as to enable the ribbon to travel backward for the preset distance;
s120, judging whether the preset distance is larger than the initialization distance;
and S130, if yes, entering a thermal printing stage, controlling the first driving assembly to be switched into a motor mode and the second driving assembly to be switched into a power generation braking module so as to enable the ribbon to travel forward for a thermal printing distance, and controlling the first driving assembly to be switched into a power generation braking mode and the second driving assembly to be switched into a motor module so as to enable the ribbon to travel backward for thermal printing.
According to the scheme, in the thermal printing initialization stage and the thermal printing stage, the two driving components move in opposite directions and do not move in the synchronous direction, so that the color ribbon is kept stable constantly.
On the basis of the above embodiment, the control process of the motor mode and the power generation braking mode is further refined, and fig. 4 is a flowchart of a method for controlling the ribbon tension stability of the thermal transfer printer according to the embodiment of the present invention; as shown in fig. 4, the method comprises the steps of:
s210, outputting pulse current to each first stator coil in the first driving assembly according to a first rotating instruction in an initialization stage, and controlling each first control switch to be disconnected so as to enable the first driving assembly to be in a motor mode; and controlling not to output pulse current to each second stator coil in the second motor according to the second braking instruction, and controlling at least one second control switch to be opened at a second variable switching frequency so as to enable the second motor assembly to be in a power generation braking mode.
Specifically, referring to fig. 2, the first driving assembly 10 includes at least two phases of first stator coils 11, a first rotor 12, at least one first damping resistor 13, and at least one first control switch 14; the maximum number of the first damping resistors is the same as the number of the first stator coils; the first damping resistor 13 and the first control switch 14 are connected in series; the first stator coil 11 is connected in parallel with the first damping resistor 13 and the first control switch 14; the second driving assembly 20 comprises at least two phases of a second stator coil 21, a second rotor 22, at least one second damping resistor 23 and at least one second control switch 24; the maximum number of the second damping resistors is the same as the number of the second stator coils 21; the second damping resistor 23 and the second control switch 24 are connected in series; the second stator coil 21 is connected in parallel with a second damping resistor 23 and a second control switch 24;
the first driving assembly 10 is in a motor mode to generate forward traction force by outputting pulse current to each first stator coil 11 in the first driving assembly 10 according to the first rotation instruction and controlling each first control switch 13 to be opened; according to the second braking instruction, the second motor assembly 20 can be in a power generation braking mode so as to generate reverse braking force by controlling not to output pulse current to each second stator coil 21 in the second driving assembly 20 and controlling at least one second control switch 23 to be opened at a second variable switching frequency; thus, the stability of the tension of the ribbon is ensured in the initial stage.
It can be appreciated that when the second motor assembly 20 is in the power generation braking mode, at least one of the second control switches 24 needs to be controlled to be turned on at the second variable switching frequency, that is, all of the second control switches 24 can be simultaneously controlled to be turned on to generate a larger braking force, and one of the second control switches 24 can be controlled to be turned on at the second variable switching frequency to generate a certain braking force; the number of the second control switches 24 to be turned on in the present embodiment may be determined according to the magnitude of the actually required braking force, and is not particularly limited herein.
S220, judging whether the preset advancing distance of the color ribbon is larger than the forward initializing distance;
s230, if yes, controlling not to output pulse current to each first stator coil in the first driving assembly according to the first braking instruction, and controlling at least one first control switch to be opened at a first variable switching frequency so as to enable the first motor assembly to be switched into a power generation braking mode; and outputting pulse current to each second stator coil in the second driving assembly according to the second rotation instruction, and controlling the second control switch to be disconnected so as to enable the second driving assembly to be in a motor mode;
the first motor component can control the first variable switching frequency to be lower in the process of switching from the motor mode to the power generation braking mode so as to ensure that the damping current is less in change and the stable switching of the color ribbon can be well ensured; when the switching is completed, the first variable switching frequency can be adjusted to be higher, so that the tension of the ribbon can be higher; likewise, the second driving component can lower the second variable switching frequency in advance in the process of switching from the power generation braking mode to the motor mode, and can well ensure the smooth switching of the color ribbon.
S240, judging whether the preset advancing distance of the color ribbon is larger than the reverse initializing distance;
s250, if yes, entering a thermal printing stage, outputting pulse current to each first stator coil in the first driving assembly according to a first rotating instruction, and controlling each first control switch to be disconnected so as to enable the first driving assembly to be switched back to a motor mode; and controlling not to output pulse current to each second stator coil in the second motor according to the second braking instruction, and controlling at least one second control switch to be opened at a second variable switching frequency so as to switch the second motor assembly back to the power generation braking mode;
s260, judging whether the advancing preset distance of the ribbon is larger than the thermal printing distance;
s270, if yes, controlling not to output pulse current to each first stator coil in the first motor according to the first braking instruction, and controlling at least one first control switch to be opened at a first variable switching frequency so as to enable the first motor component to be switched into a power generation braking mode; and outputting pulse current to each second stator coil in the second driving assembly according to the second rotation instruction, and controlling the second control switch to be switched off so that the second driving assembly is also switched back to the motor mode until the ribbon reversely advances for the thermal printing distance.
In this embodiment, the control processes of the motor mode and the power generation braking mode are further refined by specifically combining the components of each driving component, so that stable control of the ribbon tension in different thermal printing stages is realized.
In addition, while maintaining the tension of the ribbon stable in this embodiment, the current on the second damping resistor or the first damping resistor may also be received in the thermal printing initialization stage or the thermal printing stage; thereby detecting the tension of the ribbon on the ribbon in real time according to the current on the second damping resistor or the first damping resistor.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (9)

1. A ribbon tension stabilizing control system for a thermal transfer printer, comprising: the device comprises a first driving assembly, a second driving assembly and a control module; the first driving component is connected with the second driving component through a color ribbon;
the control module is connected with the first driving assembly and the second driving assembly through electric signals; the control module is used for controlling the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the color ribbon to forward travel a preset distance in an initialization stage, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor mode so as to enable the color ribbon to reversely travel the preset distance;
and the first driving component is further controlled to be switched into the power generation braking mode and the second driving component is further controlled to be switched into the motor mode so as to enable the ribbon to travel forward for the thermal printing distance, and the first driving component is further controlled to be switched into the power generation braking mode and the second driving component is further controlled to be switched into the motor mode so as to enable the ribbon to travel backward for the thermal printing distance.
2. The ribbon tension control system of claim 1, wherein the first drive assembly comprises at least two phase first stator coils, a first rotor, at least one first damping resistor, at least one first control switch; the maximum number of the first damping resistors is the same as the number of the first stator coils; the first damping resistor and the first control switch are connected in series; the first stator coil is connected with the first damping resistor and the first control switch in parallel;
controlling the first drive assembly in a motor mode, comprising:
the control module outputs pulse current to each first stator coil in the first driving assembly according to a first rotating instruction, and controls each first control switch to be disconnected so as to enable the first driving assembly to be in the motor mode;
controlling the first drive assembly in a power generation braking mode, comprising:
the control module controls not to output pulse current to each first stator coil in the first driving assembly according to a first braking instruction, and controls at least one first control switch to be opened at a first variable switching frequency so that the first driving assembly is in the power generation braking mode.
3. The ribbon tension control system of claim 2, wherein the second driving assembly comprises at least two phase second stator coils, a second rotor, at least one second damping resistor, and at least one second control switch; the maximum number of the second damping resistors is the same as the number of the second stator coils;
the second damping resistor and the second control switch are connected in series; the second stator coil is connected with the second damping resistor and the second control switch in parallel;
controlling the second drive assembly in a motor mode, comprising:
the control module outputs pulse current to each second stator coil in the second driving assembly according to a second rotation instruction, and controls the second control switch to be disconnected so as to enable the second driving assembly to be in the motor mode;
controlling the second drive assembly in a power generation braking mode, comprising:
the control module controls not to output pulse current to each second stator coil in the second driving assembly according to a second braking instruction, and controls at least one second control switch to be opened at a second variable switching frequency so as to enable the second motor assembly to be in the power generation braking mode.
4. The ribbon tension stabilizing control system of claim 1, wherein the control module comprises a first controller and a second controller;
the first controller is used for controlling the first driving assembly or the second driving assembly to be in the motor mode;
the second controller is used for controlling the first driving assembly or the second driving assembly to be in the power generation braking mode.
5. The thermal transfer printer ribbon tension stabilization control system of claim 3, wherein the control module further comprises a tension determination unit;
the tension determining unit is used for detecting the tension of the ribbon on the ribbon according to the current on the first damping resistor or the second damping resistor.
6. A method for controlling ribbon tension stability of a thermal transfer printer, which is applied to the ribbon tension stability control system of the thermal transfer printer according to any one of claims 1 to 5, and comprises the following steps:
in an initialization stage, controlling the first driving assembly to be in a motor mode and the second driving assembly to be in a power generation braking mode so as to enable the ribbon to travel forward for a preset distance, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor mode so as to enable the ribbon to travel backward for the preset distance;
judging whether the preset distance is larger than an initialization distance or not;
if yes, entering a thermal printing stage, controlling the first driving assembly to be switched into the motor mode and controlling the second driving assembly to be switched into the power generation braking mode so as to enable the ribbon to forward travel a thermal printing distance, and controlling the first driving assembly to be switched into the power generation braking mode and the second driving assembly to be switched into the motor mode so as to enable the ribbon to reversely travel the thermal printing distance.
7. The method of claim 6, wherein controlling the first driving assembly in the motor mode comprises:
outputting pulse current to each first stator coil in the first driving assembly according to a first rotating instruction, and controlling each first control switch to be disconnected so as to enable the first driving assembly to be in a motor mode;
the first driving assembly is controlled to be in a power generation braking mode, specifically:
and controlling not to output pulse current to each first stator coil in the first motor according to a first braking instruction, and controlling at least one first control switch to be opened at a first variable switching frequency so as to enable the first motor assembly to be in a power generation braking mode.
8. The method for controlling ribbon tension stability of thermal transfer printer according to claim 7,
the second driving assembly is controlled to be in a motor mode, specifically:
outputting pulse current to each second stator coil in the second driving assembly according to a second rotation instruction, and controlling the second control switch to be switched off so as to enable the second driving assembly to be in a motor mode;
the second driving assembly is controlled to be in a power generation braking mode, specifically:
and controlling not to output pulse current to each second stator coil in the second motor according to a second braking command, and controlling at least one second control switch to be opened at a second variable switching frequency so as to enable the second motor assembly to be in a power generation braking mode.
9. The method of claim 8, further comprising:
receiving a current on the first damping resistor or the second damping resistor;
and detecting the tension of the ribbon on the ribbon according to the current on the first damping resistor or the second damping resistor.
CN202310960500.9A 2023-08-01 2023-08-01 Ribbon tension stability control system and method for thermal transfer printer Pending CN116852881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310960500.9A CN116852881A (en) 2023-08-01 2023-08-01 Ribbon tension stability control system and method for thermal transfer printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310960500.9A CN116852881A (en) 2023-08-01 2023-08-01 Ribbon tension stability control system and method for thermal transfer printer

Publications (1)

Publication Number Publication Date
CN116852881A true CN116852881A (en) 2023-10-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310960500.9A Pending CN116852881A (en) 2023-08-01 2023-08-01 Ribbon tension stability control system and method for thermal transfer printer

Country Status (1)

Country Link
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